The Digital Scholar

Practical 13 To find the weight of an unknown object by using principle of moments. VIVA VOCE 1. What is the objective of this experiment?  Ans: The objective is to find the weight of an unknown object using the principle of moments. 2. Describe the setup of this experiment.  Ans: The setup typically involves a pivot point, a lever arm (such as a meter stick), and the unknown object suspended at a known distance from the pivot. 3. How does the principle of moments apply in this experiment? Ans: The principle of moments states that for an object to be in equilibrium, the sum of the clockwise moments about any point must be equal to the sum of the anticlockwise moments about the same point. This principle is used to find the weight of the unknown object. 4. What measurements are needed for this experiment? Ans: We need to measure the distance from the pivot point to the suspension point of the unknown object and any other weights used in the experiment. 5. How will you ensure the object

PRACTICAL 12  To find the weight of an unknown object by using vector addition of forces. VIVA VOCE 1.  What is the objective of this experiment?    Ans: The objective is to find the weight of an unknown object by using vector addition of forces. 2. Describe the setup of this experiment.   Ans: The setup involves suspending the unknown object from a support and attaching known weights to it. Strings are used to hang the weights, and their tensions are measured. 3.  How does vector addition of forces help in finding the weight of the unknown object?    Ans: By applying known weights to the unknown object and measuring the tensions in the strings, we can use vector addition to find the resultant force, which represents the weight of the object. 4. What principle governs the vector addition of forces in this experiment?    Ans: The principle of vector addition states that the resultant force of two or more forces acting on an object can be found by summing the individual forces as vectors

PRACTICAL 11 To find the tension in the strings by balancing a metre rod on the stands. VIVA VOCE 1. What is the purpose of this experiment?    Ans: The purpose is to find the tension in the strings by balancing a meter rod on the stands. 2. Describe the setup of this experiment.  Ans: The setup involves placing a meter rod horizontally on two stands. Strings are attached to each end of the rod, and weights are hung from the strings to create tension. 3.  Why is it necessary to balance the meter rod?    Ans: Balancing the meter rod ensures that the forces acting on it are in equilibrium, allowing us to accurately determine the tension in the strings. 4. How will you adjust the weights to achieve balance?   Ans: We will adjust the weights on either side of the meter rod until it remains level and stationary, indicating that the tensions in the strings are balanced. 5.  What factors affect the tension in the strings?    Ans: The tension in the strings is affected by the weights attached

PRACTICAL 10 To verify the principle of moments by using a metre rod balanced on a wedge. VIVA VOCE 1.  What is the objective of this experiment?    Ans: The objective is to verify the principle of moments by using a meter rod balanced on a wedge. 2. Explain the principle of moments.    Ans: The principle of moments states that for an object to be in equilibrium, the sum of the clockwise moments about any point must be equal to the sum of the anticlockwise moments about the same point. 3.  How will you set up the experiment?    Ans: Place the meter rod horizontally on a wedge and adjust the position of weights along the rod until it is balanced.  4. What equipment do you need for this experiment?    Ans: You will need a meter rod, a wedge, weights, and a balance. 5. Why is it important to ensure the meter rod is balanced?    Ans: Balancing the meter rod ensures that the principle of moments can be accurately demonstrated, showing that the clockwise and anticlockwise moments are equal.

   PRACTICAL 9 To determine the resultant of two forces graphically using a Horizontal force table. VIVA VOCE 1.  What is the objective of this practical experiment?   Ans: The objective is to determine the resultant of two forces graphically using a horizontal force table. 2. Describe the setup of a horizontal force table.  Ans: A horizontal force table consists of a circular platform with a center pin. Forces are applied to the platform using strings or ropes attached to pulleys at various angles. 3.  How do you represent forces graphically on a force table?  Ans: Forces are represented by vectors, where the direction of the vector corresponds to the direction of the force, and the magnitude of the vector represents the magnitude of the force. 4.  What is the principle behind determining the resultant of two forces graphically?   Ans: According to the parallelogram law of vector addition, the resultant of two forces is represented by the diagonal of the parallelogram formed by the ve

  PRACTICAL 8 To determine the value of 'g' by Atwood's Machine VIVA VOCE 1.  What is the purpose of conducting the Atwood's machine experiment?    Ans: The purpose is to determine the acceleration due to gravity (g) using the Atwood's machine setup. 2.  Describe the Atwood's machine setup.  Ans: The Atwood's machine consists of a pulley with a string passing over it. Two masses of different weights are suspended on either end of the string. 3. How does the Atwood's machine work?   Ans: When the masses are released, they experience a net force due to the difference in their weights. This causes an acceleration of the system. 4. What is the relationship between the masses and the acceleration in Atwood's machine?    Ans: According to Newton's second law, the acceleration of the system is directly proportional to the net force acting on it, which is the difference in weights of the masses. 5.  How will you measure the acceleration in the Atwood'

  PRACTICAL 7 Measure the force of limiting friction by rolling a roller on a horizontal plane VIVA VOCE 1.  What is the objective of this practical?    Ans: The objective is to measure the force of limiting friction by rolling a roller on a horizontal plane. 2. What equipment will you use for this experiment?    Ans: We will use a roller, a horizontal plane, weights, a spring balance, and a marker. 3.  How will you set up the experiment?    Ans: Place the roller on the horizontal plane and attach the spring balance to it. Add weights to the roller gradually until it starts to move. Mark the position where the roller begins to move. 4. What is limiting friction?    Ans: Limiting friction is the maximum force of friction that can be exerted between two surfaces before motion starts. 5.  How will you calculate the force of limiting friction?    Ans: The force of limiting friction will be equal to the weight applied to the roller when it just begins to move. 6.  Why is it important to mar